Pen mill cutter head



FIG. 1 is a front, top, right side isometric view of a pen mill cutter head in accordance with our design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a back elevation view thereof;

FIG. 4 is a top plan elevation view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a left side elevation view thereof; and,

FIG. 7 is a right side view thereof.

The broken lines illustrate portions of the environment or woodworking pen mill which form no part of the claimed design. 

CLAIM The ornamental design for a pen mill cutter head, as shown and described. 